标题: Direct recovery of degraded LiCoO2 cathode material from spent lithium-ion batteries: Efficient impurity removal toward practical applications
作者: Yang, HM (Yang, Huimeng); Deng, BW (Deng, Bowen); Jing, XY (Jing, Xiaoyun); Li, W (Li, Wei); Wang, DH (Wang, Dihua)
来源出版物: WASTE MANAGEMENT 卷: 129 页: 85-94 DOI: 10.1016/j.wasman.2021.04.052 出版年: JUN 15 2021
摘要: Regenerating cathode material from spent lithium-ion batteries (LIBs) permits an effective approach to resolve resource shortage and environmental pollution in the increasing battery industry. Directly renovating the spent cathode materials is a promising way, but it is still challenging to efficiently remove all of the complex impurities (such as binder, carbon black, graphite and current collectors) without destroying the material structure in the electrode. Herein, a facile strategy to directly remove these impurities and simultaneously repair the degraded LiCoO2 by a target healing method is reported. Specifically, by using an optimized molten salt system of LiOH-KOH (molar ratio of 3:7) where LiNO3 and O-2 both serve as oxidants, the impurities can be completely removed, while the structure, composition and morphology of degraded LiCoO2 can be successfully repaired to commercial level based on a two-stage heating process (300 degrees C for 8 h and 500 degrees C for 16 h, respectively), resulting in a high recovery rate of approximately 100% for cathode material. More importantly, the regenerated LiCoO2 exhibits a high reversible capacity, good cycling stability and excellent rate capability, which are comparable with commercial LiCoO2. This work demonstrates an efficient approach to recycle and reuse advanced energy materials. (C) 2021 Elsevier Ltd. All rights reserved.
PubMed ID: 34044320
作者关键词: Li-ion batteries; Cathode material; Recycling; Regeneration; Molten salts
地址: [Yang, Huimeng; Deng, Bowen; Jing, Xiaoyun; Li, Wei; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.
通讯作者地址: Li, W; Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.
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